1/* 2* Copyright (c) Microsoft Corporation. All rights reserved. 3* Copyright (c) 2023 Huawei Device Co., Ltd. 4* Licensed under the Apache License, Version 2.0 (the "License"); 5* you may not use this file except in compliance with the License. 6* You may obtain a copy of the License at 7* 8* http://www.apache.org/licenses/LICENSE-2.0 9* 10* Unless required by applicable law or agreed to in writing, software 11* distributed under the License is distributed on an "AS IS" BASIS, 12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13* See the License for the specific language governing permissions and 14* limitations under the License. 15* 16* This file has been modified by Huawei to verify type inference by adding verification statements. 17*/ 18 19// === tests/cases/conformance/declarationEmit/typePredicates/declarationEmitThisPredicates01.ts === 20declare function AssertType(value:any, type:string):void; 21export class C { 22 m(): this is D { 23AssertType(this instanceof D, "boolean"); 24AssertType(this, "this"); 25AssertType(D, "typeof D"); 26 return this instanceof D; 27 } 28} 29 30export class D extends C { 31} 32 33